Mariella Moon has been a night editor for Engadget since 2013, covering everything from consumer technology and video games to strange little robots that could operate on the human body from the inside one day. She has a special affinity for space, its technologies and its mysteries, though, and has interviewed astronauts for Engadget.
at the center of our galaxy, the Milky Way also serves as home to smaller stellar black hole s that form when a massive star collapses. Scientists believe there arein our galaxy alone, but most of them have yet to be discovered. The ones that had already been found are, on average, around 10 times the size of our sun, with the biggest one reaching 21 solar masses.
Gaia BH3, as it's now called, was first noticed by a team of ESA scientists poring over data from the mission to look for anything unusual. An old giant star from the nearby Aquila constellation caught their attention with its wobbling, leading to the discovery that it was orbiting a massive black hole.
Scientists have long believed that it's the metal-poor stars that can create high-mass black holes after they collapse, because they lose less mass in their lifetimes. In other words, they'd theoretically still have a lot of materials left by the time of their death to form a massive black hole.
We'll most likely see more detailed studies about binary systems and stellar black holes that use data from BH3 and its companion star in the future. The ESA believes that BH3's discovery is just the beginning, and it's going to be the focus of more investigations as we seek to unravel the mysteries of the universe.
Stellar Black Hole Black Holes European Space Agency
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